<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>列表排序</title>
    <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
        <h2>人员列表（遍历数组）</h2>
        <input type="text" v-model="keyWord" placeholder="请输入您要搜索的名字"/>
        <button @click="sortType = 2">年龄升序</button>
        <button @click="sortType = 1">年龄降序</button>
        <button @click="sortType = 0">原顺序</button>
        <ul>
            <li v-for="(p,index) of filPersons" :key="index">
                {{p.name}} - {{p.age}}
            </li>
        </ul>
    </div>

    <script type="text/javascript">
        Vue.config.productionTip = false

        // 用computed实现（优先），因为简洁
        new Vue({
            el: '#root',
            data: {
                keyWord: '',
                sortType: 0,
                persons: [
                    {id: '001', name: '马冬梅', age: 18,sex: '女'},
                    {id: '002', name: '周冬雨', age: 19,sex: '女'},
                    {id: '003', name: '周杰伦', age: 21,sex: '男'},
                    {id: '004', name: '温兆伦', age: 22,sex: '男'}
                ]
            },
            computed: {
                filPersons() {
                    const arr = this.persons.filter((p) => {
                        return p.name.indexOf(this.keyWord) !== -1;
                    });
                    // 判断一下是否需要排序
                    if (this.sortType) {
                        arr.sort((p1,p2) => {
                            return this.sortType === 1 ? p2.age - p1.age : p1.age - p2.age
                        })
                    }
                    return arr;
                }
            }
        })
    </script>
</body>
</html>